用模板实现动态数组

http://topic.csdn.net/t/20040609/05/3075498.html

申请与释放2至3维数组的函数
template<class T>
inline void Intialize2DArray(T **&xxx, long rows, long cols)
{
long i, j;
for (i=0; i<rows; i++)
{
for (j=0; j<cols; j++)
{
xxx[i][j] = T(0);
}
}
}

template<class T>
void Create2DArray(T **&xxx, long rows, long cols)
{
xxx = new T *[rows];
for (long i=0; i<rows; i++)
{
xxx[i]=new T[cols];
}
Intialize2DArray(xxx, rows, cols);
}

//删除2维数组时只需2个参数，不需要传数组的第2维大小
template<class T>
void Delete2DArray(T **&xxx, long rows)
{
for(long i=0; i<rows; i++)
{
delete []xxx[i];
}
delete []xxx;
xxx=0;
}

template<class T>
void Create3DArray(T ***&xxx, long n1, long n2, long n3)
{
xxx = new T **[n1];
for (long i=0; i<n1; i++)
{
Create2DArray(xxx[i], n2, n3);
Intialize2DArray(xxx[i], n2, n3);
}
}

//删除3维数组时只需3个参数，不需要传数组的第3维大小
template<class T>
void Delete3DArray(T ***&xxx, long n1, long n2)
{
for (long i=0; i<n1; i++)
{
Delete2DArray(xxx[i], n2);
}
delete []xxx;
xxx=0;
}

举例：使用3维数组

int n1 = 100;
int n2 = 100;
int n3 = 100;
float ***array_3D;
Create3DArray(array_3D, n1, n2, n3);

...//use the 3d array in form "array_3D[i][j][k]"

Delete3DArray(array_3D, n1, n2);